$(document).ready(
	function() {
				
		$('#dyn_form_4').bind('submit', function() {
			
			var sErr = '';
			
									if ($("input[@name='data_element_2904']:checked").val() == undefined || $("input[@name='data_element_2904']:checked").val() == "")
						{
							sErr += '* \n';
						}
												if ($("[name='data_element_2906']").val() == '')
						{
							sErr += '* Naam\n';
						}
												if ($("[name='data_element_2907']").val() == '')
						{
							sErr += '* Functie\n';
						}
												if ($("[name='data_element_2908']").val() == '')
						{
							sErr += '* Bedrijf\n';
						}
												if ($("[name='data_element_2909']").val() == '')
						{
							sErr += '* Adres1\n';
						}
												if ($("[name='data_element_2912']").val() == '')
						{
							sErr += '* Stad\n';
						}
												if ($("[name='data_element_2913']").val() == '')
						{
							sErr += '* Postcode\n';
						}
												if ($("[name='data_element_2915']").val() == '')
						{
							sErr += '* Telefoon\n';
						}
												if ($("[name='data_element_2916']").val() == '')
						{
							sErr += '* eMail Adres\n';
						}
												if ($("[name='data_element_2920']").val() == '')
						{
							sErr += '* Activiteit\n';
						}
												if ($("input[@name='data_element_2926']:checked").val() == undefined || $("input[@name='data_element_2926']:checked").val() == "")
						{
							sErr += '* Voeg mijn naam toe aan uw driemaandelijkse eNieuws\n';
						}
									
			if (sErr != '') {
				alert('Please complete the following fields:\n\n' + sErr);
				return false;
			}
			
			return true;
		});
	}
);